<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<div>
  <h1>登录页面</h1>
  <input type="text" placeholder="用户名" v-model="user.username">
  <input type="password" placeholder="密码" v-model="user.password">
  <input type="button" value="登录" @click="login()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
  let v = new Vue({
            el:"body>div",
            data:{
              user:{
                username:"",
                password:""

              }
            },
            methods:{
             login(){
                //发送请求
               axios.post("/login",v.user).then(function (response) {
                 if(response.data==1){
                   alert("登录成功")
                   location.href="/";
                 }else if(response.data==2){
                   alert("用户名不存在");
                 }else{
                   alert("密码错误");
                 }
               })
}
}
})
</script>
</body>
</html>